Atotech Deutschland Gmbh

Ellen Habig

Heiko Brunner

Jens Geisler

Lars Kohlmann

Björn Dingwerth

Jens Heydecke

Lukas Bedrnik

Andreas Noack

Roland Vogel

Birgit Sonntag

Sandra Niemann

Jenny Schulz

Additives for electrolyte baths for the electrodeposition of zinc or zinc alloy layer are described. The additives are polymers with terminal amino groups. These polymers are obtainable by reaction of at least one diamino compound (having two tertiary amino groups) with at least one di(pseudo)halogen compound, wherein the diamino compound is used in stoichiometric excess. The additives effect, in particular, a very little formation of bubbles and only few burnings as well as a uniform distribution of layer thickness in the electrodeposition of zinc or zinc alloy layers.

Polymers having terminal amino groups and use thereof as additives for zinc and zinc alloy electrodeposition baths

The invention provides a process for depositing metallic layers from acidic or alkaline zinc or zinc alloy baths containing organic additives selected from brighteners, surfactants and complexing agents, a soluble zinc salt and optionally further metal salts selected from Fe, Ni, Co, Sn salts, wherein the bath can be purified continuously so that the process can be operated without interruption, as well as apparatus for carrying out this process.

Method for continuously operating acid or alkaline zinc or zinc alloy baths

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Berlin, Germany

Ellen Habig